Digital Commons Network^™

The Implications Of Eco-Evolutionary Processes For The Emergence Of Marine Plankton Community Biogeography, Boris Sauterey, Ben Ward, Jonathan Rault, Chris Bowler, David Claessen

Entomology Faculty Publications

Models of community assembly have been used to illustrate how the many functionally diverse species that compose plankton food webs can coexist. However, the evolutionary processes leading to the emergence of plankton food webs and their interplay with migratory processes and spatial heterogeneity are yet to be explored. We study the eco-evolutionary dynamics of a modeled plankton community structured in both size and space and physiologically constrained by empirical data. We demonstrate that a complex yet ecologically and evolutionarily stable size-structured food web can emerge from an initial set of two monomorphic phytoplankton and zooplankton populations. We also show that …

Breast Cancer Screening In Patients With Newly Diagnosed Lung And Colorectal Cancer: A Population-Based Study Of Utilization, Gelareh Sadigh, Ruth C. Carlos, Kevin C. Ward, Jeffrey M. Switchenko, Renjian Jiang, Kimberly E. Applegate, Richard Duszak Jr.

Radiology Faculty Publications

Purpose—To assess breast cancer screening utilization in Medicare beneficiaries with colorectal and lung cancer versus cancer-free controls.

Methods—Female fee-for-service Medicare beneficiaries who were ≥ 67 years old and diagnosed with lung or colorectal cancer between 2000 and 2011 and who reported to a Surveillance, Epidemiology, and End Results (SEER) registry (case group) were followed for 2 years after their diagnoses, unless death, a diagnosis of breast cancer, or the end of 2013 came first. A similar number of cancer-free controls were individually matched to cases by age, race, registry region, and follow-up time. Screening utilization was defined as …

Global Land Carbon Sink Response To Temperature And Precipitation Varies With Enso Phase, Yuanyuan Fang, Anna M. Michalak, Christopher R. Schwalm, Deborah N. Huntzinger, Joseph A. Berry, Philippe Ciais, Shilong Piao, Benjamin Poulter, Joshua B. Fisher, Robert B. Cook, Daniel Hayes, Maoyi Huang, Akihiko Ito, Atul Jain, Huimin Lei, Chaoqun Lu, Jiafu Mao, Nicholas C. Parazoo, Shushi Peng, Daniel M. Ricciuto, Xiaoying Shi, Bo Tao, Hanqin Tian, Weile Wang, Yaxing Wei, Jia Yang

Plant and Soil Sciences Faculty Publications

Climate variability associated with the El Niño-Southern Oscillation (ENSO) and its consequent impacts on land carbon sink interannual variability have been used as a basis for investigating carbon cycle responses to climate variability more broadly, and to inform the sensitivity of the tropical carbon budget to climate change. Past studies have presented opposing views about whether temperature or precipitation is the primary factor driving the response of the land carbon sink to ENSO. Here, we show that the dominant driver varies with ENSO phase. Whereas tropical temperature explains sink dynamics following El Niño conditions (r TG,P = 0.59, p …

Crowd-Sourcing The Smart City: Using Big Geosocial Media Metrics In Urban Governance, Matthew Zook

Geography Faculty Publications

Using Big Data to better understand urban questions is an exciting field with challenging methodological and theoretical problems. It is also, however, potentially troubling when Big Data (particularly derived from social media) is applied uncritically to urban governance via the ideas and practices of “smart cities”. This essay reviews both the historical depth of central ideas within smart city governance —particular the idea that enough data/information/knowledge can solve society problems—but also the ways that the most recent version differs. Namely, that the motivations and ideological underpinning behind the goal of urban betterment is largely driven by technology advocates and neoliberalism …

The Cloud, The Crowd, And The City: How New Data Practices Reconfigure Urban Governance?, Philip Ashton, Rachel Weber, Matthew Zook

Geography Faculty Publications

No abstract provided.

The Urban Geographical Imagination In The Age Of Big Data, John Taylor Shelton

Geography Faculty Publications

This paper explores the variety of ways that emerging sources of (big) data are being used to re-conceptualize the city, and how these understandings of what the urban is shapes the design of interventions into it. Drawing on work on the performativity of economics, this paper uses two vignettes of the ‘new urban science’ and municipal vacant property mapping in order to argue that the mobilization of Big Data in the urban context doesn’t necessarily produce a single, greater understanding of the city as it actually is, but rather a highly variegated series of essentialized understandings of the city that …

Non-Spec Fly Ash Remediation, Jeffrey Whidden, Joe Thomas

World of Coal Ash Proceedings

No abstract provided.

Preliminary Techno-Economic Evaluation Of A Novel Membrane Based Separation And Recovery Process For Rare Earth Elements From Coal Combustion Residues, Zachary Hendren, Young Chul Choi, Helen Hsu-Kim, James C. Hower

World of Coal Ash Proceedings

No abstract provided.

Single Bidders And Tacit Collusion In Highway Procurement Auctions, David R. Barrus, Frank A. Scott Jr.

Institute for the Study of Free Enterprise Working Papers

Collusion in auctions can take different forms, one of which is refraining from bidding. Such behavior may be overt or tacit.Certain aspects of highway procurement auctions facilitate collusive outcomes. We collect data on asphalt paving auctions conducted by the Kentucky Transportation Cabinet from 2005 to 2007. We analyze both the bid participation decision and the pricing decision. We include variables that affect firm’s’ costs as well as variables that capture competitive and strategic effects. Most importantly, we determine the potential service area of each asphalt plant and use that information to determine the potential bidders for each paving project. We …

International Diffusion Of Food Safety Standards: The Role Of Domestic Certifiers And International Trade, Rezgar Mohammed, Yuqing Zheng

Agricultural Economics Faculty Publications

We examined the cross-national adoption of six major private food safety standards, focusing on the role of certifiers and international trade. Results show that the number of certification bodies existing in the domestic country, food exports, and the proportion of food exports to North America had positive effects on a country's adoption of food safety standards. Distance leads to product differentiation for the standards and therefore disadvantages developing countries in Africa and Asia for adopting the standards, which are all based in the United States or Europe. Providing these countries with better access to certifiers can alleviate this geographic disadvantage.

Gregariousness Does Not Vary With Geography, Developmental Stage, Or Group Relatedness In Feeding Redheaded Pine Sawfly Larvae, John W. Terbot Ii, Ryan L. Gaynor, Catherine R. Linnen

Biology Faculty Publications

Aggregations are widespread across the animal kingdom, yet the underlying proximate and ultimate causes are still largely unknown. An ideal system to investigate this simple, social behavior is the pine sawfly genus Neodiprion, which is experimentally tractable and exhibits interspecific variation in larval gregariousness. To assess intraspecific variation in this trait, we characterized aggregative tendency within a single widespread species, the redheaded pine sawfly (N. lecontei). To do so, we developed a quantitative assay in which we measured interindividual distances over a 90-min video. This assay revealed minimal behavioral differences: (1) between early-feeding and late-feeding larval instars, …

Introduction To Web Mapping, Sarah Watson

Research Data and Scholarly Communications Committee Workshops

While most of us depend on programs like Google Maps to help us navigate the world, it barely scratches the surface of the diverse world of web mapping. In this introductory workshop, participants will learn about web mapping platforms, how digital maps are typically used, different visualization techniques for engaging users, and tips for searching and integrating data to create finished maps. A variety of web-based tools will be discussed, including Carto and OpenStreetMap. Participants will be guided through a tutorial that teaches them the basics of web mapping. No GIS or coding experience necessary.

The presentation slides are available …

Works Of Dr. P. P. Karan 1960-2016, Brad Allard

Library Student Employees' Research

No abstract provided.

Ovarian Cancer Incidence Corrected For Oophorectomy, Lauren A. Baldwin, Quan Chen, Thomas C. Tucker, Connie G. White, Robert N. Ore, Bin Huang

Obstetrics and Gynecology Faculty Publications

Current reported incidence rates for ovarian cancer may significantly underestimate the true rate because of the inclusion of women in the calculations who are not at risk for ovarian cancer due to prior benign salpingo-oophorectomy (SO). We have considered prior SO to more realistically estimate risk for ovarian cancer. Kentucky Health Claims Data, International Classification of Disease 9 (ICD-9) codes, Current Procedure Terminology (CPT) codes, and Kentucky Behavioral Risk Factor Surveillance System (BRFSS) Data were used to identify women who have undergone SO in Kentucky, and these women were removed from the at-risk pool in order to re-assess incidence rates …

Ten Simple Rules For Responsible Big Data Research, Matthew Zook, Solon Barocas, Danah Boyd, Kate Crawford, Emily Keller, Seeta Peña Gangadharan, Alyssa Goodman, Rachelle Hollander, Barbara A. Koenig, Jacob Metcalf, Arvind Narayanan, Alondra Nelson, Frank Pasquale

Geography Faculty Publications

No abstract provided.

Poster Session 1, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

1. Sensing and Educating the Nexus to Sustain Ecosystems (SENSE): A Kentucky-West Virginia Partnership, Susan Hendricks and others, Hancock Biological Station, Murray State University
2. Using OpenNSPECT to Model Riparian Buffer Effectiveness for Mitigating Sediment Accumulation in Small Order Agricultural Streams, Lee Moser, College of Agriculture, Food and Environment, University of Kentucky
3. The Benefits of Staying Local – the Kentucky Section of the American Society of Agricultural and Biological Engineers, Carmen Agouridis and Michael Sama, Dept. of Biosystems and Agricultural Engineering, University of Kentucky
4. Overview of Groundwater Sampling Conducted in an Unconventional Oil and Gas Play Area of eastern …

Proceedings Of 2017 Kentucky Water Resources Annual Symposium, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

This symposium was planned and conducted as a part of the state water resources research institute annual program that is supported by Grant/Cooperative Agreement Number G16AP00055 from the United States Geological Survey. The contents of this proceedings document and the views and conclusions presented at the symposium are solely the responsibility of the individual authors and presenters and do not necessarily represent the official views of the USGS or of the symposium organizers and sponsors. This publication is produced with the understanding that the United States Government is authorized to reproduce and distribute reprints for government purposes. Mention of trade …

Finding, Organizing, And Creating Spatial Data, Sarah Watson

Research Data and Scholarly Communications Committee Workshops

To produce a compelling and attractive map, it is necessary to have quality data. However, finding quality data and using it to prepare maps can be quite challenging. This workshop will begin with a review of different types of spatial data, how to access it, and strategies for understanding and organizing it. We will then focus on creating our own data by georeferencing scanned paper maps. Georeferencing involves assigning geographic coordinates to images (e.g., maps, aerial photos) that lack a defined coordinate system. Georeferencing helps us locate where an image is located in the world so we can effectively use …

Genome Sequencing Of The Sweetpotato Whitefly Bemisia Tabaci Med/Q, Wen Xie, Chunhai Chen, Zezhong Yang, Litao Guo, Xin Yang, Dan Wang, Ming Chen, Jinqun Huang, Yanan Wen, Yang Zeng, Yating Liu, Jixing Xia, Lixia Tian, Hongying Cui, Qingjun Wu, Shaoli Wang, Baoyun Xu, Xianchun Li, Xinqiu Tan, Murad Ghanim, Baoli Qiu, Huipeng Pan, Dong Chu, Helene Delatte, M. N. Maruthi, Feng Ge, Xueping Zhou, Xiaowei Wang, Fanghao Wan, Yuzhou Du, Xuguo Joe Zhou

Entomology Faculty Publications

The sweetpotato whitefly Bemisia tabaci is a highly destructive agricultural and ornamental crop pest. It damages host plants through both phloem feeding and vectoring plant pathogens. Introductions of B. tabaci are difficult to quarantine and eradicate because of its high reproductive rates, broad host plant range, and insecticide resistance. A total of 791 Gb of raw DNA sequence from whole genome shotgun sequencing, and 13 BAC pooling libraries were generated by Illumina sequencing using different combinations of mate-pair and pair-end libraries. Assembly gave a final genome with a scaffold N50 of 437 kb, and a total length of 658 Mb. …

Introduction To Gis, Sarah Watson

Research Data and Scholarly Communications Committee Workshops

Do you have a research question that you would like to depict geographically? Have you ever wanted to include a map in your presentations or reports, but could not find one that suits your specific needs? This workshop will address these questions by introducing participants to Geographic Information Systems (GIS), a tool that facilitates the visualization of spatial data, geographic analysis, and the production of maps. Attendees will learn the basics of GIS terminology, explore different GIS software packages, and will walk through a hand-on tutorial focused on basic geographic analysis. No prior GIS knowledge required.

The presentation slides are …

An Open-Sourced Statistical Application For Identifying Complex Toxicological Interactions Of Environmental Pollutants, Jordan T. Perkins, Michael C. Petriello, Li Xu, Arnold J. Stromberg, Bernhard Hennig

Superfund Research Center Faculty Publications

The rising number of chemicals that humans are exposed to on a daily basis, as well as advances in biomonitoring and detection technologies have highlighted the diversity of individual exposure profiles (complex body burdens). To address this, the toxicological sciences have begun to shift away from examining toxic agents or stressors individually to focusing on more complex models with multiple agents or stressors present. Literature on interactions between chemicals is fairly limited in comparison with dose-response studies on individual toxicants, which is largely due to experimental and statistical challenges. Experimental designs capable of identifying these complex interactions are often avoided …

Understanding Precautionary Cash At Home And Abroad, Michael W. Faulkender, Kristine W. Hankins, Mitchell A. Petersen

Institute for the Study of Free Enterprise Working Papers

In the presence of market frictions, it is optimal for firms to stockpile cash to fund investment projects which may arise in the future. Prior work has documented that firms’ precautionary savings motives predict variation in the size of firms’ cash stockpiles. The dramatic run-up in cash stockpiles raises the question of why these precautionary motives have increased. In the presence of repatriation taxes, foreign and domestic cash are imperfect substitutes. We show that although precautionary motives explain variation in the level of cash held domestically, they provide little explanatory power for the level of foreign cash. Multinational firms’ foreign …

Data Management And Metadata, Kathryn Lybarger

Research Data and Scholarly Communications Committee Workshops

Are you flooded with files? Drowning in data? Swimming in spreadsheets? Just add metadata! Doing research can generate a lot of data quickly, so quickly that it can easily get out of hand. Well-planned metadata can help you use, organize, search, share, and manage your data effectively! In this session, we'll review some standards and best practices for metadata, and then get some hands-on practice creating and using metadata for different types of data.

The presentation slides are available by clicking the Download button on the right.

Supporting materials for a workshop activity are listed as additional files below and …

Seed Dormancy-Breaking In A Cold Desert Shrub In Relation To Sand Temperature And Moisture, Huiliang Liu, Buhailiqiemu Abudureheman, Lingwei Zhang, Jerry M. Baskin, Carol C. Baskin, Daoyuan Zhang

Biology Faculty Publications

Seasonal periodicity of seed germination and its relationship to seasonal changes in temperature and soil moisture have been well studied in seeds of species with physiological dormancy. However, relatively little information is available on the role of these environmental factors in controlling germination of seeds with physical dormancy (PY). Our primary aim was to determine if seeds of the cold desert sand dune semi-shrub Eremosparton songoricum exhibits seasonal periodicity of seed germination and the relationship between seed dormancy break and soil temperature and moisture. In the laboratory, seeds incubated on dry, wet, wet-dry and dry-wet sand were exposed to a …

Human Rights: From Legal Transplants To Fair Translation, James M. Donovan

Law Faculty Scholarly Articles

The current regime of international human rights suffers from three shortcomings: First, it has failed to adequately address the reality of cultural diversity. Second, the formalized human rights treaties have been ineffective in their ability to compel states to reform their behaviors, and third, the uncontrolled growth in the number of human rights weakens the impact of appeals to that standard.

Although treated as independent problems, this paper finds that these three limitations are sufficiently linked such that a remedy to the first will simultaneously resolve the others. Parts I and II of the paper describe how the imposition of …

Malignant Melanoma In Kentucky: An Analysis Of The Individual And Social Factors On Disease Stage And Treatment, Virginia Valentin

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

Introduction: In 2016 there will be an estimated 76,380 new cases of malignant melanoma and 10,130 deaths in the United States (US). ¹ Malignant melanoma incidence is increasing faster than any other preventable cancer in the US with an expected 112,000 new cases a year by 2030. ^2,3 This capstone attempts to quantify the association of individual and social factors on melanoma late-stage diagnosis and non-adherence to surgical treatment guidelines for early-stage lesions in Kentucky.

Methods: The analysis combines three datasets: individual level data from the Kentucky Cancer Registry, census tract level data from the US Census and …

“I Wonder What You Think Of Me”: A Qualitative Approach To Examining Stereotype Awareness In Appalachian Students, Chelsea G. Adams

Theses and Dissertations--Educational, School, and Counseling Psychology

Historically, Appalachia has been stereotyped as being a culture bred in poverty and ignorance. Much research has shown that stereotyping reveals a pattern of behavioral change and an impact on psychological well-being for the stereotyped (e.g., Pinel, 1999; Woodcock, Jernandez, Estrada, & Schultz, 2012), and has largely been centered on race and gender (e.g., Byrnes, 2008; Tuckman & Monetti, 2011). Less is known about the development of culture-specific stereotypes such as those related to Appalachians – a highly stigmatized group (Daniels, 2014; Otto, 2002). The purpose of this study was to gain an understanding of how adolescents in rural Appalachia …

Engagement In The Knowledge Economy: Regional Patterns Of Content Creation With A Focus On Sub-Saharan Africa, Sanna Ojanperä, Mark Graham, Ralph K. Straumann, Stefano De Sabbata, Matthew Zook

Geography Faculty Publications

Increasing digital connectivity has sparked many hopes for the democratization of information and knowledge production in sub-Saharan Africa. To investigate the patterns of knowledge creation in the region compared to other world regions, we examine three key metrics: spatial distributions of academic articles (traditional knowledge production), collaborative software development, and Internet domain registrations (digitally mediated knowledge production). We find that, contrary to the expectation that digital content is more evenly geographically distributed than academic articles, the global and regional patterns of collaborative coding and domain registrations are more uneven than those of academic articles. Despite hopes for democratization afforded by …

Cultivating A Culture Of Food Justice: Impacts Of Community Based Economies On Farmers And Neighborhood Leaders In The Case Of Fresh Stop Markets In Kentucky, Heather Hyden

Theses and Dissertations--Community & Leadership Development

In this thesis, I focus on two tensions within the alternative agro-food movement. First is a question of who/what community is allowed to define food systems problems and then implement solutions. For example, food desert metaphors rely discursively on defining communities as being “without”, which perpetuates needs-based narratives, in which only professional “experts” know how to solve problems of food access. These representations ignore the creativity, agency, and resiliency of everyday food justice mobilizations happening at the grassroots level. Second, what form can solutions take within hegemonic constructions of development? I build a theoretical model based on Black geographies (McKittrick, …

Sediment Transport Modelling Using Dynamic (Dis)Connectivity Prediction For A Bedrock Controlled Catchment, David Tyler Mahoney

Theses and Dissertations--Civil Engineering

The (dis)connectivity of sediment, defined as the detachment and transport of sediment from source to sink between geomorphic zones, is a major control on sediment transport rates but has seldom taken precedence in sediment transport models that focus on assessment of sediment impacts on water supply. A watershed-scale sediment transport model was formulated that incorporates sediment (dis)connectivity knowledge and subroutines and predicts sediment flux through coupling with an excessive shear stress erosion equation. The intersecting probabilities of sediment supply, detachment, transport, and (dis)connectivity produce the probability of sediment connectivity for a watershed or region of a watershed. The integration of …